francisco police have their second edition of their line-up videos showing two men pistol whipping and robbing a man at laguna and cleary back in july. they took off in a silver dodge charger driven by a third person. if you recognize them, police want to hear from you. this is part of a new sfpd program intended to generate leads to cold cases. partly with the help of social media. >>> new at 6:00 tonight, damaged cars and businesses protestors armed with paint grenades, road flares, even an ice pick. now police want to throat book at a group of anarchists and to do it, they are demanding some help from twitter. the social networking site has been subpoenaed by the san francisco district attorney's office. cbs 5 reporter joe vazquez on what prosecutors hope to find and, of course, the latest battleground in the online privacy war, too. joe. >> reporter: what they hope to find is information on a couple of protests, one in the mission, another in the financial district back in september and october. a couple of questions. did a married couple help plan the protest on twitter and is it okay for